<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>css-notes</title>
  <style>
    h1 {
      text-shadow: 5px 5px 5px #399AB2;
    }
  </style>
</head>
<body>
<h1>文本阴影效果！</h1>
</body>
</html>
